Question

Chocolate bars come off a production line with a mean length of 6 cm and standard deviation of 0.1 cm. What is the probability that a sample size of 36 has a mean length less than 5.8 or more than 6.2 cm?
(The Normal Distribution table (Z values vs. right-tail probabilities) is in the next page.)

Answer 1

Answer:

Given that:

Chocolate bars come off a production line with a mean length of 6 cm and standard deviation of 0.1 cm.

Let be the length of 6 sample chocolates.As sample size is relatively large.So here we assume that length of chocolate follows normal distribution

Then

We need to find the probability